Byte code and Source code in Java?

Question

I'm really confused. Please someone help to give a clear answer of which of the following contain source code and byte code in java?

Student.class
Student
Student.java
Student.exe

score 5 · Accepted Answer · edited May 23 '17 at 12:28

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Student.java is the Java source code file, a text file

Student.class is the bytecode compiled from it, a binary file

Student.exe is a Windows executable (also binary, but not something you usually get from Java)

Student is not a file at all, just an abstract concept (a Java class, whose full name would be something like com.vicheanak.myapp.Student).

You may also encounter Student.jar which is an archive of all the class files and other resources that make up the application or library.

edited May 23 '17 at 12:28

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answered Mar 27 '13 at 00:43

Thilo

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exe is not restricted to windows – 75inchpianist Mar 27 '13 at 00:48
Student can also be a file. – 75inchpianist Mar 27 '13 at 00:50
depends on what you mean, binary file usually refers to a file that contains machine instructions. class files certainly do not – 75inchpianist Mar 27 '13 at 00:53
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binary file to me (especially right after a sentence referring to text files) means a non-text file. PNG and GIF are binary files. – Thilo Mar 27 '13 at 00:54

score 0 · Answer 2 · answered Mar 27 '13 at 00:42

Your source code would be Student.java. Bytecode would be Student.class. Source code becomes byte code when you compile it (eg: with javac). Student would be your class name. I'm not sure about Student.exe, it would be your bytecode if you used C/C++ on Windows.

score 0 · Answer 3 · answered Mar 27 '13 at 00:43

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Student.class is Java bytecode.

Student has no meaning - it is probably not a file.

Student.java has java source code.

Student.exe has assembler bytecode.

answered Mar 27 '13 at 00:43

raptortech97

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score 0 · Answer 4 · answered Mar 27 '13 at 00:43

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Student.class is Java bytecode.

Student.java has java source code

Student not a file at all,

Student.exe is a Windows executable file

answered Mar 27 '13 at 00:43

PSR

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score 0 · Answer 5 · answered Mar 27 '13 at 00:45

Student.class is byte code for the java virtual machine. It will execute this directly (or just in time compile it into assembly, which is instructions that the CPU reads directly).

Student is the name of your class, I guess.

Student.java is the source code for your class. It will be compiled into Student.class.

Student.exe is an executable file. It'll be coded to start up the java virtual machine, which will execute the byte code in Student.class (which will most likely be embedded inside it).

Byte code and Source code in Java?

5 Answers5